GLE (Graphics Layout Engine) is a graphics scripting language designed for creating publication quality figures (e.g., a chart, plot, graph, or diagram). GLE supports various chart types (including function plot, histogram, bar chart, scatter plot, contour plot, color map, and surface plot) through a simple but flexible set of graphing commands. More complex output can be created by relying on GLE's scripting language, which is full featured with subroutines, variables, and logic control. GLE relies on LaTeX for text output and supports mathematical formulae in graphs and figures.

Advanced Graphs and Charts Collection for PHP
provides a very easy way to embed
dynamically-generated graphs and charts into PHP
applications and HTML Web pages. The Graphing
components provide various solutions for the
incorporation of graphs and charts into
Web/intranet pages and applications. Versatile
components provide the ability for Web authors and
developers to quickly build and publish dynamic
and interactive graphs and charts.

Functy is a 3D graph drawing package. The emphasis of the application is to allow Cartesian and spherical functions to be plotted and altered quickly and easily. This immediacy and the vivid results are intended to promote fun exploration of 3D functions.

ldif2dot is a simple Python script to convert LDIF files (produced by e.g. ldapsearch) to DOT files (read by the graph drawing program dot). This lets you make picture representations of LDAP Directory Information Trees.

Emerge Activity is a small utility that parses your emerge.log and creates a picture representing successful emerge on your gentoo box. It provides a graphical view of the information returned by "genlop -l".

preload-images is a PHP class that can be used to generate pages with preloaded images. First, it can list images from a directory and store the list in a MySQL database. The class can generate HTML with JavaScript to preload all listed images in the user's browser, so the next browsed pages that need the images can load much faster.

yEd is a powerful diagram editor which can be used to quickly create diagrams manually or import external data for analysis and auto-magically arrange even large data sets by just pressing a button.
You can use yEd to quickly create flow charts, BPMN and UML diagrams, organization charts, mind maps, Entity Relationship diagrams, and many other kinds of diagrams, graphs, and networks.
Choose from a wide range of highly sophisticated layout algorithms to automatically arrange diagrams in no time.
An intuitive and visually appealing user interface makes creating diagrams fun.
Once a diagram has been created, it's easy to save, print, or export it to popular formats like PDF, SWF, EMF, SVG, JPEG, GIF, PNG, or HTML image maps.

PHPStateMapper is a PHP library for drawing a map with areas shaded by varying degrees of intensity based on data given as a simple list. It exports a PNG image in a configurable size and color. It is appropriate for generating images for use in reporting and analytics. Data can be loaded programmatically or from a comma separated values (CSV) source file.

Self-Adjusting Top Tree Implementation maintains a forest that changes over time through edge insertions and deletions. This implementation focuses on the simplified Top Tree interface, which allows you to solve a number of interesting graph problems like finding common ancestors, the heaviest edge, maintaining the diameter, center, or median and other (mostly network flow) problems. Using Top Tree interfaces, all outline problems can be solved in a clean declarative way. This implementation uses adapting ST-trees as the underlying data structure, achieving O(log n) time per expose(v,w) operation. There is also a demo that shows an easy way to integrate the toptree library and the host application.